Huygens principle, Physics

Huygen's principle : Huygen's principle states that every point of a wave front behaves as the source of small secondary wavelets which spread out in all directions with a velocity equal to the velocity of light. The new wave front is then found by constructing a surface tangential to the secondary wavelets.

 

299_Huygens principle.png

Consider a point source of light ‘S'. It sends out spherical wave fronts around it. Let AB represents a spherical wave front at any instant. According to Huygens principle each point on this AB acts as a source of light called secondary source. 

The light emerges from these secondary sources again as small spheres called wave lets. The radius of these spheres is given by Ct. where ‘C' is the velocity of light. A surface tangential to all these wave lets gives an envelope CD. This CD gives the new position of the wavefront AB after a time interval ‘t'. This process of construction of new wavefronts at different positions can be continued. Thus light advances in a direction perpendicular to the wavefront. This method of construction of wavefronts is the essence of Huygen's principle (hypothesis)

 

Posted Date: 8/29/2012 2:31:25 AM | Location : United States







Related Discussions:- Huygens principle, Assignment Help, Ask Question on Huygens principle, Get Answer, Expert's Help, Huygens principle Discussions

Write discussion on Huygens principle
Your posts are moderated
Related Questions
What is Gas Laws? Kinetic theory states that the speed of motion of the molecules in a substance decreases as the substance's temperature decreases. As well, the speed of motio

explain the construction and working of compound microscope

What is an optical port? In the fiber optics industry, optical port is the component that physically produces the connection or interface in between the harness and the illumin

how to frame constraint equations easily in physics for the chapter newtons laws of motion

WHY Surface tension increases when an highly soluble SUBSTANCE is dissolved in water WHILE IT DECREASES WHEN an weakly soluble substance is dissolved in water

Explain the Lenz Law An induced current always flows in a direction so that its electromagnetic field opposes the change in magnetic flux producing it. This is embodied in the

Reverse Bias: When P-types material of a semi conductor diode is linked a negative potential and the n-type material is linked at positive potential of a voltage source, the di

A helium nucleus and a neon nucleus are separated by a distance of 3.0 nm. The charge of the helium nucleus is +2e while that of a neon nucleus is + 10e .Find the magnitude of the

Describe capacitance or capacity of a conductor and illustrate the principle of capacitor. Derive the mathematical equation for equivalent capacitance (Capacity) When a number o

Horizontally Launched Projectiles Suppose a cannonball being launched from cannon atop a extremely high cliff. Imagine as well in which the cannonball does not encounter a impo